CN112088586B

CN112088586B - Electronic control device

Info

Publication number: CN112088586B
Application number: CN201980028384.9A
Authority: CN
Inventors: 秋叶谅; 河合义夫
Original assignee: Hitachi Astemo Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2018-05-17
Filing date: 2019-02-14
Publication date: 2021-10-08
Anticipated expiration: 2039-02-14
Also published as: CN112088586A; JP7096330B2; DE112019002049T5; JPWO2019220718A1; US20210151928A1; US11289848B2; WO2019220718A1

Abstract

The maximum value of the reaction force generated in the circuit board can be reduced. An electronic control device of the present invention includes: a cover having a hollow opening; a connector inserted into the opening; and a compressible sealing member disposed in contact with a 1 st position of an inner peripheral portion of the opening portion, and in close contact with the inner peripheral portion of the opening portion and the connector in a compressed state, in the electronic control device, the opening portion has a thickness in a 1 st direction of a hollow penetrating the opening portion, an area of a hollow region as a hollow region of the opening portion is reduced or maintained along the 1 st direction, the sealing member is disposed in the outer peripheral portion of the connector, and is inserted into the opening portion together with the connector in the 1 st direction, and the area of the hollow region at the 1 st position is smaller than an area of a hollow region at an entrance of the opening portion in the 1 st direction.

Description

Electronic control device

Technical Field

The present invention relates to an electronic control device.

Background

In recent years, the number of components mounted on a vehicle has increased with the electronic motorization and automatic driving of automobiles. On the other hand, in order to ensure competitiveness with other companies, the vehicle price is in a situation that needs to be further reduced. Therefore, demands for cost reduction of the electronic control device are becoming more stringent. On the other hand, the electronic control device has been conventionally mounted on a vehicle body frame, but in recent years, it has been required to be directly mounted on a vehicle-mounted transmission. The purpose is to reduce the cost and weight of a vehicle and to expand the mounting space for other electronic components by reducing the wiring harness between an in-vehicle transmission and an electronic control device. Under such circumstances, an inexpensive electronic control device that can cope with a severe temperature environment and a severe vibration environment is required. Patent document 1 discloses an electronic device including: the grommet includes an annular sealing portion that abuts an outer peripheral surface of the connector and a peripheral surface of the opening portion of the frame, and a latch portion that is inserted into the gap between the opening portion and the connector and engages the sealing portion with the opening portion of the frame, and the latch portion is elastically deformable in a direction in which the opening portion and the connector are coupled.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2012-124992

Disclosure of Invention

Problems to be solved by the invention

In the invention described in patent document 1, the reaction force generated by the circuit board is large.

Means for solving the problems

An electronic control device according to claim 1 of the present invention includes: a cover having a hollow opening; a connector inserted into the opening; and a compressible sealing member disposed in contact with a 1 st position of an inner peripheral portion of the opening portion, and in a compressed state, in close contact with the inner peripheral portion of the opening portion and the connector, wherein the opening portion has a thickness in a 1 st direction which is a direction in which the connector is inserted, an area of a hollow region which is a hollow region of the opening portion is reduced or maintained along the 1 st direction, the sealing member is disposed in the outer peripheral portion of the connector, and is inserted into the opening portion in the 1 st direction together with the connector, and the area of the hollow region in the 1 st position is smaller than the area of the hollow region at an entrance of the opening portion in the 1 st direction.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the maximum value of the reaction force generated by the circuit board can be reduced.

Drawings

Fig. 1 is a perspective view of an electronic control device 100 according to embodiment 1.

Fig. 2 is an exploded perspective view of the electronic control device 100 according to embodiment 1.

Fig. 3 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 1 separated.

Fig. 4 is a sectional view IV-IV of fig. 3.

Fig. 5 is a V-V sectional view in fig. 3.

Fig. 6 is a conceptual diagram illustrating a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force in embodiment 1.

Fig. 7 (a) is an exploded perspective view of comparative example apparatus 100Z, fig. 7 (b) is a bb cross-sectional view of comparative example apparatus 100Z, and fig. 7(c) is a cc cross-sectional view of comparative example apparatus 100Z.

Fig. 8 is a conceptual diagram showing a schematic relationship between the amount of insertion of the connector 3 into the opening 1aZ of the comparative example and the reaction force.

Fig. 9 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 2 being separated.

Fig. 10 is a sectional view at the X-X section of fig. 9.

Fig. 11 is an enlarged view of the periphery of the hypotenuse portion 1 b.

Fig. 12 is a conceptual diagram illustrating a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force in embodiment 2.

Fig. 13 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 3 being separated.

FIG. 14 is a cross-sectional view XIV-XIV of FIG. 13.

Fig. 15 is a plan view of the opening 1a in embodiment 3.

Fig. 16 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 4 being separated.

Fig. 17 is a cross-sectional view of XVII-XVII of fig. 16.

Fig. 18 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 5 being separated.

Fig. 19 is a view obtained by rotating fig. 18 by 180 degrees about the Z axis.

Fig. 20 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 6 separated.

Fig. 21 is a view obtained by rotating fig. 20 by 180 degrees about the Z axis.

Fig. 22 is a plan view of the opening 1a in embodiment 6.

Fig. 23 is a conceptual diagram illustrating a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force in embodiment 6.

Detailed Description

Embodiment 1-

Hereinafter, embodiment 1 of the electronic control device according to the present invention will be described with reference to fig. 1 to 11. The X axis, Y axis, and Z axis shown in the drawings are common.

Fig. 1 is a perspective view of the electronic control device 100, and fig. 2 is an exploded perspective view of the electronic control device 100. In other words, fig. 1 shows a completed state of the electronic control device 100, and fig. 2 shows a state before the electronic control device 100 is assembled. The electronic control device 100 includes a connector 3, and is coupled to a connector, not shown, corresponding to the shape of the connector 3. The electronic control device 100 is mounted on, for example, an automobile, and controls an engine, a transmission, a brake, and the like. As shown in fig. 2, the electronic control device 100 is configured by stacking the cover 1, the circuit board 5, and the base 7 in the Z direction.

The cover 1 has an opening 1 a. As shown in fig. 2, the opening 1a is hollow and has a thickness in the Z direction penetrating the hollow. Hereinafter, a region that is a hollow portion of the opening 1a, in other words, a region inside the opening 1a is referred to as a "hollow region". The connector 3 and the electronic component 4 are mounted on the circuit board 5. The connector 3 electrically connects the circuit formed on the circuit board 5 and a device external to the electronic control apparatus 100. The circuit board 5 is first fixed to the base 7 with the screw 2 in a state where the surface sealing member 6 is disposed between the base 7 and the circuit board, and then is coupled to the cover 1. In order to couple the circuit board 5 and the cover 1, the connector 3 needs to be inserted into the opening 1 a.

A seal member 3a is disposed on the outer peripheral portion of the connector 3. The connector 3 and the sealing member 3a are integrally inserted into the opening 1a in the positive Z-axis direction. Thereby, the inner peripheral surface of the opening 1a is brought into close contact with the outer peripheral portion of the connector 3 via the sealing member 3 a. The electronic control device 100 is ensured to be airtight by the sealing member 3a and the surface sealing member 6. The insertion of the connector 3 into the opening 1 will be described later in detail. In the following description, the distance from the tip of the connector 3 to the upper end of the seal member 3a is referred to as L3.

In addition to the illustrated electronic components 4, a plurality of various electronic components are mounted on the circuit board 5. The sealing member 3a is a material having compressibility, and a rubber-based material or cipg (cured in Place gasket) material can be used. Specifically, the sealing member 3a is a solid having compressibility, and examples thereof include acrylic rubber, silicone rubber, fluororubber, nitrile rubber, polyamide resin, acrylic resin, silicone resin, and fluororesin. In the present embodiment, the thickness of the sealing member 3a in the initial state, i.e., in the state before the cover 1 is separated from the circuit board 5 and assembled as shown in fig. 2, is referred to as "initial thickness t 0", and the thickness of the sealing member 3a in the completed state is referred to as "final thickness t 1".

Fig. 3 is a perspective view of the electronic control device 100 with only the cover 1 separated. However, in fig. 3, the top and bottom are reversed from fig. 1 and 2. Hereinafter, the wall surfaces on the inner peripheral side of the opening 1a are referred to as a 1 st wall surface W1, a 2 nd wall surface W2, a 3 rd wall surface W3, and a 4 th wall surface W4. The 1 st wall W1 and the 3 rd wall W3 are surfaces perpendicular to the X axis, and the value of the X coordinate of the 1 st wall W1 is smaller than that of the 3 rd wall W3. The 2 nd wall W2 and the 4 th wall W4 are surfaces perpendicular to the Y axis, and the value of the Y coordinate of the 2 nd wall W2 is larger than that of the 4 th wall W4. In the present embodiment, the 1 st wall surface W1 and the 3 rd wall surface W3 have the same shape, and the 2 nd wall surface W2 and the 4 th wall surface W4 have the same shape. A cross section perpendicular to the Y axis and passing through the center of the opening 1a in the Y direction is an IV-IV cross section. A cross section perpendicular to the X-axis and passing through the center of the opening 1a in the X-direction is defined as a V-V cross section.

Fig. 4 is a sectional view of the electronic control device 100 based on the section IV-IV in fig. 3. However, in fig. 3, the cover 1 is separated from the electronic control device 100, and in fig. 4, the cover 1 is coupled to the electronic control device 100. In fig. 4, the 1 st wall W1 is shown on the left side of the drawing, and the 3 rd wall W3 is shown on the right side of the drawing. The distance between the 1 st wall surface W1 and the 3 rd wall surface W3 and the outer peripheral portion of the connector 3, in other words, the distance between the 1 st wall surface W1 and the 3 rd wall surface W3 in the X direction is constant regardless of the Z direction. In addition, the 1 st wall surface W1 and the 3 rd wall surface W3 are at a distance from the outer peripheral portion of the connector 3 equal to a final thickness t1 which is the thickness of the sealing member 3a in the finished state.

Fig. 5 is a sectional view of the electronic control device 100 based on the V-V section in fig. 3. However, in fig. 3, the cover 1 is separated from the electronic control device 100, and in fig. 5, the cover 1 is coupled to the electronic control device 100. As shown in fig. 5, the 2 nd wall surface W2 and the 4 th wall surface W4 have a wide portion 11 having a wide width in the cross section of fig. 5, a narrow portion 13 having a narrow width in the cross section of fig. 5, and a step portion 12 connecting the wide portion 11 and the narrow portion 13. Since the shape of the cross section shown in fig. 4 is constant with respect to the change in the Z direction, the size of the opening area of the opening 1a changes with the width shown in fig. 5, and the opening area of the opening 1a is wider in the upper part of the figure and narrower in the lower part of the figure.

The wide portion 11 and the narrow portion 13 have a constant opening area with respect to the change in the Z direction, and the opening area decreases in the positive direction of the Z axis at the stepped portion 12. In other words, the opening area of the opening 1a monotonously decreases in the positive direction of the Z axis. However, the term "monotonic decrease" as used herein includes a broad-sense monotonic decrease in which the current state is reduced or maintained, rather than a narrow-sense monotonic decrease in which the decrease continues all the time. Hereinafter, the upper end of the wide portion 11, i.e., the negative end in the Z direction, is also referred to as the entrance of the opening 1a in the Z direction.

The distance L11 between the connector 3 and the inner peripheral surface of the opening 1a at the wide portion 11 is longer than the initial thickness t0, which is the thickness of the sealing member 3a in the initial state. Therefore, when the connector 3 is inserted into the opening 1a, the wide portion 11 of the 2 nd wall surface W2 and the 4 th wall surface W4 does not contact the sealing member 3 a. In the following description, the length of the wide portion 11 in the Z direction is referred to as L12.

Fig. 6 is a conceptual diagram showing a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force received by the connector 3 due to the insertion in the manufacturing process of the electronic control device 100. However, in fig. 6, the insertion amount is zero in a state where the distal end of the connector 3 is in contact with the entrance of the opening 1 a. In fig. 6, the larger the number is, the larger the reaction force is, for P1 to P4 indicating the magnitude of the reaction force.

The relationship between the insertion amount and the reaction force shown in fig. 6 is as follows. Until the insertion amount reached L3, the reaction force was zero, and at L3, the reaction force was temporarily P3. The amount of the insertion was reduced to P1, and continued to P1 until the insertion amount reached L3+ L12. When the insertion amount is L3+ L12, the reaction force becomes P4, which is the largest in the range shown in fig. 6, and then decreases to continue to be P3.

Next, the relationship between the insertion amount and the reaction force shown in fig. 6 will be described. Since the distance from the distal end of the connector 3 to the seal member 3a is L3, if the insertion amount is smaller than L3, the seal member 3a does not contact the inner peripheral surface of the opening 1 a. Therefore, if the insertion amount is less than L3, the reaction force is zero. In a state where the insertion amount is L3, the 1 st wall surface W1 and the 3 rd wall surface W3 are in contact with the seal member 3 a. When a force is applied to the connector 3 in the positive Z-axis direction in a state where the two are in contact with each other, the seal member 3a in contact with the 1 st wall surface W1 and the 3 rd wall surface W3 is compressed and crushed, and the seal member 3a enters the opening 1 a. The reaction force of the force required for compression of the seal member 3a in contact with the 1 st wall surface W1 and the 3 rd wall surface W3 is P3. Thereafter, the 1 st wall surface W1 and the 3 rd wall surface W3 are in close contact with the seal member 3a, and therefore, a reaction force P1 is generated by friction.

When the insertion of the connector 3 is further advanced to an insertion amount of L3+ L12, the seal member 3a reaches the step portion 12. In this state, the sealing member 3a is in contact with not only the 1 st wall surface W1 and the 3 rd wall surface W3 but also the 2 nd wall surface W2 and the 4 th wall surface W4. When a force is applied to the connector 3 in the positive direction of the Z axis in this state, the seal member 3a in contact with the 2 nd wall surface W2 and the 4 th wall surface W4 is compressed and crushed, and the seal member 3a further enters the inside of the opening 1 a. The sum of the reaction force of the force required for compressing the seal member 3a in contact with the 2 nd wall surface W2 and the 4 th wall surface W4 and the frictional force of the seal member 3a in contact with the 1 st wall surface W1 and the 3 rd wall surface W3 is P4. Then, the entire peripheral portion of the sealing member 3a is in close contact with the inner peripheral portion of the opening 1a, and therefore, a reaction force P3 is generated by friction.

In this way, in the present embodiment, the compression of the seal member 3a is performed in two stages, so that it is possible to prevent the generation of an excessive reaction force. The reaction force received by the connector 3 damages the circuit board 5 on which the connector 3 is mounted, for example, the electronic component is detached, and the solder is cracked. Such a problem becomes more pronounced as the reaction force becomes larger, and therefore, as in the present embodiment, the influence can be suppressed by dispersing in two stages.

Comparative example

The comparative example apparatus 100Z as a comparative example has substantially the same shape and size as the electronic control apparatus 100, but the shape of the opening is different. The materials of the components of the comparative example apparatus 100Z are the same as those of the electronic control apparatus 100. Fig. 7 (a) is an exploded perspective view of comparative example apparatus 100Z, fig. 7 (b) is a bb cross-sectional view of comparative example apparatus 100Z, and fig. 7(c) is a cc cross-sectional view of comparative example apparatus 100Z. When the correspondence between the comparative example apparatus 100Z and the electronic control apparatus 100 is shown, fig. 7 (a) corresponds to fig. 3, fig. 7 (b) corresponds to fig. 4, and fig. 7(c) corresponds to fig. 5. Fig. 7 (b) is the same as fig. 4.

As shown in fig. 7 (b) and 7(c), the opening 1aZ of the comparative example device 100Z is uniform without the step 12 as in the electronic control device 100. That is, the opening area of the opening 1aZ of the comparative example is always constant regardless of the Z direction. Therefore, in the assembly process of the comparative example apparatus 100Z, when the connector is inserted into the comparative example opening 1aZ, the sealing member 3a in the non-compressed state is simultaneously brought into contact with all the sides of the comparative example opening 1aZ, and the entire sealing member 3a is compressed.

Fig. 8 is a conceptual diagram showing a schematic relationship between the amount of insertion of the connector 3 into the opening 1aZ of the comparative example and the reaction force received by the connector 3 due to the insertion in the process of manufacturing the comparative example apparatus 100Z. However, in fig. 8, the insertion amount is set to zero in a state where the distal end of the connector 3 is in contact with the entrance of the opening 1aZ of the comparative example. In fig. 8, P3 indicating the magnitude of the reaction force is the same as P3 shown in fig. 6. The reaction force P5 shown in fig. 8 is larger than the value P4 shown in fig. 6.

The relationship between the insertion amount and the reaction force shown in fig. 8 is as follows. Until the insertion amount reached L3, the reaction force was zero, and at L3, the reaction force was temporarily P5. Then decreases and continues as P3. In the comparative example device 100Z, in a state where the insertion amount is L3, the entire peripheral portion of the comparative example opening 1aZ is in contact with the sealing member 3a, and the entire peripheral portion of the sealing member 3a is compressed. At this time, the reaction force of the force required for compression is P5, and is greater than the aforementioned values of P3 and P4. Therefore, in the comparative example, the maximum value of the reaction force is large, and problems such as detachment of the electronic component and cracking of the solder are likely to occur.

According to embodiment 1 described above, the following operational effects can be obtained.

(1) The electronic control device 100 includes: a cover having a hollow opening 1 a; a connector 3 inserted into an inner peripheral portion of the opening 1 a; and a compressible sealing member 3a disposed in contact with the inner peripheral portion of the opening 1a in the position in the completed state shown in fig. 4 and 5, and in a compressed state, brought into close contact with the inner peripheral portion of the opening 1a and the connector 3. The opening 1a has a thickness in the Z direction which is the direction in which the connector 3 is inserted. The area of the hollow region, which is a hollow region of the opening 1a, is reduced or maintained along the Z direction. The sealing member 3a is disposed on the outer peripheral portion of the connector 3, and is inserted into the opening 1a in the Z direction together with the connector. As shown in fig. 5, the area of the hollow region at the position of the finished state is smaller than the area of the hollow region at the entrance of the opening 1a in the Z direction. Therefore, as in the comparative example apparatus 100Z, the sealing member 3a can be prevented from being compressed at one time at the entrance of the opening 1a and generating a large reaction force. In other words, the electronic control device 100 can reduce the maximum value of the reaction force generated by the circuit board 5. Since a large reaction force to the circuit board 5 causes detachment of the electronic component, cracking of the solder, and the like, the electronic control device 100 in the present embodiment can reduce adverse effects on the circuit board 5 and improve connection reliability of the solder used for the circuit board 5, as compared with the comparative example device 100Z.

(2) The shape of the inner peripheral portion of the opening 1a, i.e., the 2 nd wall surface W2 and the 4 th wall surface W4, has a planar symmetry plane including the Z direction and the X direction and passing through the center of the opening 1a in the Y direction. Therefore, the connector 3 can be pressed from both sides uniformly in accordance with the insertion into the opening 1 a.

(3) The hollow region of the opening 1a has a spread in the X direction and the Y direction. When the hollow region at the entrance of the opening 1a in the Z direction is compared with the region of the outer shape of the seal member 3a disposed in an uncompressed state on the outer periphery of the connector 3, one side of the seal member 3a is longer in the X direction, but one side of the hollow region is longer in the Y direction. Therefore, at the entrance of the opening 1a, the sealing member 3a in contact with the 1 st wall surface W1 and the 3 rd wall surface W3 is compressed first, and the sealing member 3a corresponding to the 2 nd wall surface W2 and the 4 th wall surface W4 is not compressed. That is, the sealing member 3a is not entirely compressed at least at the entrance of the opening 1 a.

(modification 1)

The 1 st wall surface W1 and the 3 rd wall surface W3 may be provided with a step, and the 2 nd wall surface W2 and the 4 th wall surface W4 may be provided with no step. That is, the shapes of the 1 st wall surface W1 and the 3 rd wall surface W3 may be exchanged with the shapes of the 2 nd wall surface W2 and the 4 th wall surface W4.

Embodiment 2-

Embodiment 2 of the electronic control device will be described with reference to fig. 9 to 12. In the following description, the same components as those in embodiment 1 are denoted by the same reference numerals, and the differences will be mainly described. Points not specifically described are the same as those in embodiment 1. The present embodiment is different from embodiment 1 mainly in that the wall surface of a part of the opening 1a has a slope.

Fig. 9 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 2 being separated. That is, fig. 9 corresponds to fig. 3 in embodiment 1. The 1 st wall W1 and the 3 rd wall W3 are the same as those of embodiment 1, and the 2 nd wall W2 and the 4 th wall W4 are different from those of embodiment 1. The shapes of the 2 nd wall surface W2 and the 4 th wall surface W4 will be described with reference to fig. 10 below. A cross section perpendicular to the X axis and passing through the center of the opening 1a in the X direction is defined as an X-X cross section.

Fig. 10 is a sectional view at the X-X section of fig. 9. Fig. 10 corresponds to fig. 5 in embodiment 1. The 2 nd wall surface W2 and the 4 th wall surface W4 have a chamfered portion 1 b. The angle θ of the chamfered portion 1b is arbitrary, and is, for example, 5 degrees.

Fig. 11 is an enlarged view of the periphery of the hypotenuse portion 1 b. The distance L21 from the connector 3 at the illustrated upper end of the chamfered portion 1b, i.e., the entrance of the opening 1a, is longer than the initial thickness t0 of the sealing member 3 a. The distance from the connector 3 at the position advanced by the distance L22 from the upper end of the hypotenuse portion 1b to the plus side of the Z axis is equal to the initial thickness t0 of the seal member 3 a. From here, the distance between the beveled portion 1b and the connector 3 further narrows in the positive Z-axis direction, and the distance decreases continuously from the upper end of the beveled portion 1b to the position of the distance L23, and finally becomes equal to the final thickness t1 of the sealing member 3 a. That is, the area of the hollow region continuously decreases in a section extending from the entrance of the opening 1a by a distance L23 in the Z direction.

Fig. 12 is a conceptual diagram showing a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force received by the connector 3 due to the insertion in the manufacturing process of the electronic control device 100 according to embodiment 2. Fig. 12 corresponds to fig. 6 of embodiment 1. Until the insertion amount exceeds L3, the description is omitted because the same is true as in embodiment 1. When the insertion amount reaches L3+ L22, the sealing member 3a in the initial state comes into contact with the 2 nd wall surface W2 and the oblique side portion 1b of the 4 th wall surface W4. Therefore, thereafter, each time the insertion amount of the connector 3 increases, the compression amount of the seal member 3a increases, so the force for crushing and the reaction force thereof continue to be generated. In addition, each time the insertion amount of the connector 3 increases, the contact area of the sealing member 3a with the connector 3 also increases, so the frictional force also increases.

When the insertion amount reaches L3+ L23, the distance between the opening 1a and the connector 3 is constant thereafter, and therefore the compression amount of the seal member 3a is not changed, and the reaction force is only friction. Therefore, when the insertion amount is L3+ L23 or more, the reaction force becomes P2 as in embodiment 1. The maximum reaction force in embodiment 2 is P31 until the insertion amount becomes L3+ L23, and this value is smaller than the maximum reaction force P4 in embodiment 1. This is because the sealing member 3a in contact with the 2 nd wall surface W2 and the 4 th wall surface W4 is compressed at once in embodiment 1, but is gradually compressed in this embodiment.

According to embodiment 2 described above, the following operational effects can be obtained.

(4) The area of the hollow region of the opening 1a continuously decreases as it advances in the Z direction in a section of a distance L23 from the entrance of the opening 1a in the Z direction. Therefore, the amount of collapse of the sealing member 3a is continuously increased in accordance with the increase in the amount of insertion of the connector 3 into the opening 1a, so that a sudden increase in the reaction force can be avoided.

Embodiment 3-C

Embodiment 3 of the electronic control device will be described with reference to fig. 13 to 15. In the following description, the same components as those in embodiment 1 are denoted by the same reference numerals, and the differences will be mainly described. Points not specifically described are the same as those in embodiment 1. The present embodiment is different from embodiment 1 mainly in that it has a step surface described later.

Fig. 13 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 3 being separated. That is, fig. 13 corresponds to fig. 3 in embodiment 1. The 1 st wall W1 and the 3 rd wall W3 are the same as those of embodiment 1, and the 2 nd wall W2 and the 4 th wall W4 are different from those of embodiment 1. The 2 nd wall surface W2 and the 4 th wall surface W4 can be said to have a shape of a flat triangular prism extracted from a plane, in other words, to have a stepped surface having a step by the oblique side f. The step will be described in detail with reference to fig. 14 and 15. A cross section perpendicular to the X-axis and passing through the center of the opening 1a in the X-direction is defined as a V-V cross section. The shape of the V-V section is the same as that of fig. 5 of embodiment 1. A cross section perpendicular to the Y axis and passing through the center of the opening 1a in the Y direction is XIV-XIV cross section.

Fig. 14 is a cross-sectional view taken along the line XIV-XIV of fig. 13, and mainly shows the 4 th wall W4. As described above, the 2 nd wall W2 also has the same shape as the 4 th wall W4. The 4 th wall surface W4 is divided into two regions by the oblique side f, and the depth is constant in each region. The 4-2 th surface W4-2, which is the upper region of the oblique side f, has a depth greater than the 4-1 st surface W4-1, which is the lower region of the oblique side f. The oblique side f is a straight line connecting the right and left ends of the upper part of the 4 th wall surface W4 in the drawing to the approximate center in the height direction of the center in the drawing. When the oblique side f is assumed to have a shape like a broken line at the center of the figure, the shape of the opening 1a is the same as that of embodiment 1. The oblique side f is also referred to as a "boundary portion" because it is the boundary between the 4-1 st surface W4-1 and the 4-2 nd surface W4-2.

Fig. 15 is a plan view of the opening 1 a. In fig. 15, the outer shape of the connector 3 is shown by a dotted line for reference. As described above, since the depth of the 2 nd wall W2 and the 4 th wall W4 is different between the upper region and the lower region of the oblique side f in fig. 14, the 2 nd wall W2 and the 4 th wall W4 shown in the upper and lower parts of fig. 15 are indicated by two straight lines. That is, the inner straight line indicates the region below the hypotenuse f, and the outer straight line indicates the region above the hypotenuse f. In detail, the 4 th wall surface W4 has an inner surface defined as the 4 th-1 st surface W4-1 and an outer surface defined as the 4 th-2 nd surface W4-2.

The distance of the connector 3 from the 1 st wall surface W1 and the distance of the connector 3 from the 3 rd wall surface W3 are equal to the final thickness t1 of the seal member 3 a. The 2 nd wall surface W2 and a region of the lower portion of the oblique side f at the 4 th wall surface W4, for example, the 4 th-1 st surface W4-1 are spaced from the connector 3 by a distance equal to the final thickness t1 of the seal member 3 a. The distance between the upper region of the oblique side f on the 2 nd wall surface W2 and the 4 th wall surface W4, for example, the 4 th-2 nd surface W4-2, and the connector 3 is longer than the initial thickness t0 of the sealing member 3a, and is, for example, L11 as in embodiment 1.

When the connector 3 is inserted into the opening 1a, the sealing member 3a first contacting the 1 st wall surface W1 and the 3 rd wall surface W3 is compressed, and at the same time, the sealing member 3a contacting both ends of the 2 nd wall surface W2 and the 4 th wall surface W4 with a small width is compressed. Thereafter, when the amount of insertion of the connector 3 into the opening 1a increases, the sealing member 3a in contact with the oblique side f of the 2 nd wall surface W2 and the 4 th wall surface W4 is compressed. The position where the seal member 3a is compressed moves from both ends of the 2 nd wall surface W2 and the 4 th wall surface W4 toward the center as the amount of insertion increases. When the seal member 3a is compressed at the widthwise center of the 2 nd wall surface W2 and the 4 th wall surface W4, the entire circumference of the seal member 3a is compressed. When the amount of insertion is further increased from this point, the entire peripheral portion of the seal member 3a generates dynamic friction, and therefore, the reaction force P2 is generated as in embodiment 1 and embodiment 2.

According to embodiment 3 described above, the following operational effects can be obtained.

(5) The cross section of the opening 1a is a rectangle which is one of polygons. Among the plurality of wall surfaces of the opening 1a corresponding to the sides of the rectangle, i.e., the 1 st wall surface W1 to the 4 th wall surface W4, the 2 nd wall surface W2 and the 4 th wall surface are stepped surfaces. The 4 th wall surface W4 of the step surface includes: w4-1 on the 4 th-1 surface including the Z direction; a 4-2 th surface W4-2 which is parallel to the 4-1 st surface W4-1 and is disposed on the outer peripheral side of the opening 1a with respect to the 4-1 st surface W4-1; and a boundary portion, i.e., a hypotenuse f, which is a boundary between the 4-1 st surface W4-1 and the 4-2 nd surface W4-2. The 4 th wall W4 decreases the ratio of the 4 th-2 nd wall W4-2 as it goes in the Z direction, and finally becomes the 4 th-1 st wall W4-1. Specifically, the position is advanced by a distance L12 from the entrance of the opening 1a in the Z direction, and then, the position is the 4-1 st surface W4-1.

Embodiment 4-

A 4 th embodiment of the electronic control device will be described with reference to fig. 16 to 17. In the following description, the same components as those in embodiment 3 are denoted by the same reference numerals, and the differences will be mainly described. Points not specifically described are the same as those in embodiment 3. In the present embodiment, the shape of the oblique side f and the machined surface are mainly different from those of embodiment 3. In embodiment 3, the 2 nd wall surface W2 and the 4 th wall surface are stepped surfaces, but in this embodiment, only the 4 th wall surface W4 is a stepped surface.

Fig. 16 is a perspective view of only the cover 1 of the electronic control device 100 according to embodiment 4 being separated. That is, fig. 16 corresponds to fig. 3 in embodiment 1. The 1 st wall W1 and the 3 rd wall W3 are the same as those of embodiments 1 to 3, and the 2 nd wall W2 and the 4 th wall W4 are different from those of embodiment 1. The 2 nd wall surface W2 in the present embodiment is not processed as in the 1 st wall surface W1 and the 3 rd wall surface W3. The 4 th wall surface W4 has a sloping side f having a different shape from that of the 3 rd embodiment. A cross section perpendicular to the Y axis and passing through the center of the opening 1a in the Y direction is represented by XVII to XVII cross sections.

Fig. 17 is a cross-sectional view taken at section XVII-XVII in fig. 16, mainly showing the 4 th wall W4. The difference from the 4 th wall surface W4 in the 3 rd embodiment shown in fig. 14 is the shape of the oblique side f. In embodiment 3, the oblique side f is a straight line connecting the right and left ends of the upper part of the 4 th wall surface W4 in the drawing to the substantially center in the height direction of the center in the drawing. The oblique side f in the present embodiment is a straight line connecting the upper center of the 4 th wall surface W4 and the approximate center in the height direction of the left and right ends. The height of the left and right ends of the oblique side f is, for example, a position advanced from the entrance of the opening 1a by a distance L12 in the Z direction. The point that the depths of the 4-1 st surface W4-1 and the 4-2 nd surface W4-2 divided by the oblique side f are constant in the respective regions and the point that the 4-2 nd surface W4-2 has a depth larger than that of the 4-1 st surface W4-1 are the same as those of embodiment 3.

When the connector 3 is inserted into the opening 1a, first, the sealing member 3a in contact with the 1 st wall surface W1, the 2 nd wall surface W2, and the 3 rd wall surface W3 is compressed, and at the same time, the sealing member 3a in contact with a small width at the center in the width direction of the 4 th wall surface W4 is compressed. Thereafter, when the amount of insertion of the connector 3 into the opening 1a increases, the sealing member 3a in contact with the oblique side f of the 4 th wall surface W4 is compressed. The position where the seal member 3a is compressed moves from the center of the 4 th wall surface W4 to both ends as the insertion amount increases. When the seal member 3a is compressed at both ends of the 4 th wall surface W4, the entire peripheral portion of the seal member 3a is compressed. When the amount of insertion is further increased from this point, the entire peripheral portion of the seal member 3a generates dynamic friction, and therefore, the reaction force P2 is generated as in embodiments 1 to 3.

According to embodiment 4 described above, the following operational effects can be obtained.

(6) The oblique side f as the boundary is a straight line connecting the center in the width direction of the 4 th wall surface W4 at the entrance in the Z direction of the opening 1a and the end in the width direction of the 4 th wall surface W4 at the position advanced by the distance L12 in the Z direction from the entrance. Therefore, stress is first generated in the center in the width direction in the 4 th wall surface W4. In general, when the circuit board 5 is fixed, both ends are often fixed, and in the present embodiment, the circuit board is also fixed to the base 7 by the screws 2. Therefore, the screws 2 are not preferable because the both ends of the circuit board 5 are already warped, and the both ends are further warped. According to the configuration of the present embodiment, the 4 th wall surface W4 is warped at the center in the width direction, and thus the warpage generated at both ends of the circuit board 5 can be reduced.

Embodiment 5-

A description will be given of embodiment 5 of the electronic control device with reference to fig. 18 to 19. In the following description, the same components as those in embodiment 1 are denoted by the same reference numerals, and the differences will be mainly described. Points not specifically described are the same as those in embodiment 1. In the present embodiment, the shape of the oblique side f is different from that of embodiment 3 mainly, and the 2 nd wall surface W2 is also different from that of embodiment 4 in that it has the same shape as the 4 th wall surface W4.

Fig. 18 and 19 are perspective views showing only the cover 1 of the electronic control device 100 according to embodiment 4 separated. Fig. 18 corresponds to fig. 3 in embodiment 1. Fig. 19 is a view obtained by rotating fig. 18 by 180 degrees about the Z axis. In fig. 18, the 2 nd wall surface W2 which is the wall surface on the anterior side of the eye of the opening 1a is hatched, and the shape thereof is not shown, but the shape of the 2 nd wall surface W2 is clearly shown in fig. 19 rotated by 180 degrees. In the present embodiment, since the reaction force applied to the connector 3 is symmetrical in the left-right direction, the connector 3 is less likely to be inserted obliquely into the cover 1 than in embodiment 4, and the electronic control device 100 is easier to assemble.

According to embodiment 5 described above, the following operational effects can be obtained.

(7) The cross section of the opening 1a is formed by two sets of parallel sides, and the 2 nd wall surface W2 and the 4 th wall surface W4, which are wall surfaces corresponding to the 1 set of sides parallel to the X axis, are stepped surfaces. Therefore, the connector 3 can be pressed from both sides uniformly in accordance with the insertion into the opening 1 a.

Embodiment 6-

Embodiment 6 of the electronic control device will be described with reference to fig. 20 to 23. In the following description, the same components as those in embodiment 5 are denoted by the same reference numerals, and the differences will be mainly described. Points not specifically described are the same as those in embodiment 5. In the present embodiment, the first wall W1 and the 3 rd wall W3 are mainly different from the first embodiment in that they are also processed in the same manner as the 2 nd wall W2 and the 4 th wall W4.

Fig. 20 and 21 are perspective views showing only the cover 1 of the electronic control device 100 according to embodiment 6 separated. Fig. 20 corresponds to fig. 3 in embodiment 1. Fig. 21 is a view obtained by rotating fig. 20 by 180 degrees about the Z axis. In fig. 20, the 2 nd wall surface W2 and the 3 rd wall surface W3, which are wall surfaces on the anterior side of the eye of the opening 1a, are hatched, and the shapes thereof are not shown, but the shapes of the 2 nd wall surface W2 and the 3 rd wall surface W3 are clearly shown in fig. 21 rotated by 180 degrees. As shown in fig. 20 and 21, in the present embodiment, the oblique side f is formed on all the wall surfaces of the 1 st wall surface W1 to the 4 th wall surface W4.

The oblique side f is a straight line connecting the upper center and the approximate center in the height direction of the left and right ends of each wall surface in all of the 1 st to 4 th wall surfaces W1 to W4. The height of the left and right ends of the oblique side f is, for example, a position advanced from the entrance of the opening 1a by a distance L12 in the Z direction. The heights of the left and right ends of the oblique side f may not be all common to the 4 wall surfaces, but are preferably common to the two facing surfaces. In each of the 4 wall surfaces, the depth of two regions divided by the oblique side f is constant in each region. Further, the region above the oblique side f, i.e., the region divided by the oblique side f and having a small inner Z-axis value has a depth greater than the region below the oblique side f.

Fig. 22 is a plan view of the opening 1 a. In fig. 22, the outer shape of the connector 3 is shown by a dotted line for reference. The outer peripheral portion of the seal member 3A in the non-compressed state is indicated by a broken line as reference numeral 3A. The 1 st wall surface W1 is divided into a 1 st-1 st surface W1-1 and a 1 st-2 nd surface W1-2 by an oblique side f. The 2 nd wall surface W1 is divided into a 2 nd-1 st surface W2-1 and a 2 nd-2 nd surface W2-2 by an oblique side f. The 3 rd wall surface W1 is divided into a 3-1 st surface W3-1 and a 3-2 nd surface W3-2 by an oblique side f. The 1 st-2 surface W1-2, the 2 nd-2 surface W2-2, the 3 rd-2 surface W3-2 and the 4 th-2 surface W4-2 are located outside the connector 3 from the 1 st-1 surface W1-1, the 2 nd-1 surface W2-1, the 3 rd-1 surface W3-1 and the 4 th-1 surface W4-1.

As shown in FIG. 22, the outermost rectangle formed by the 1 st-2 nd surface W1-2, the 2 nd-2 nd surface W2-2, the 3 rd-2 nd surface W3-2 and the 4 th-2 nd surface W4-2 is larger than the rectangle indicated by the reference numeral 3A on the outer peripheral portion of the seal member 3A in the non-compressed state. That is, at the entrance of the opening 1a in the Z direction, the hollow area of the opening 1a is larger than the outer shape of the sealing member 3a in the non-compressed state, and does not contact at the entrance of the opening 1 a.

Fig. 23 is a conceptual diagram showing a schematic relationship between the amount of insertion of the connector 3 into the opening 1a and the reaction force received by the connector 3 due to the insertion in the process of manufacturing the electronic control device 100 according to embodiment 6. However, in the example shown in fig. 23, the height of the left and right ends of the oblique side f is set to a position advanced by a distance L12 in the Z direction from the entrance of the opening 1a on all the wall surfaces. Fig. 23 is explained below.

Since the distance from the distal end of the connector 3 to the seal member 3a is L3, if the insertion amount is smaller than L3, the seal member 3a does not contact the inner peripheral surface of the opening 1 a. Therefore, if the insertion amount is less than L3, the reaction force is zero. In a state where the insertion amount is L3, the top of the oblique side f contacts the seal member 3a at the widthwise center of all the wall surfaces of the 1 st wall surface W1 to the 4 th wall surface W4. When a force is applied to the connector 3 in the positive Z-axis direction in this state, the seal member 3a that is in contact with the central portion of each wall surface that is the top of the oblique side f is compressed and crushed.

Immediately after that, even if the insertion amount is increased, the portions of the oblique side f that contact the seal member 3a are at two points on each wall surface, and the force required to compress the seal member 3a is constant. However, the contact area of the seal member 3a with each wall surface increases, so the reaction force continues to increase. Thereafter, when the insertion amount reaches L3+ L12, the entire peripheral portion of the seal member 3a is crushed and contacts the opening 1a, and the seal member 3a is not further compressed, so the reaction force is only a friction force. The reaction force at this time is P2 similar to that in embodiment 1.

According to embodiment 6 described above, the following operational effects can be obtained.

(8) All the 1 st wall surface W1 to the 4 th wall surface W4 are stepped surfaces. Therefore, the maximum reaction force generated by the insertion of the connector 3 into the opening 1a can be minimized.

The above embodiments and modifications may be combined. In the above, various embodiments and modifications have been described, but the present invention is not limited to these. Other schemes considered within the scope of the technical idea of the present invention are also included in the scope of the present invention.

Description of the symbols

1a … opening part

3 … connector

4 … electronic component

5 … Circuit Board

100 … electronic control device

f … hypotenuse

W1 … wall No. 1

W2 … wall 2

W3 … wall No. 3

W4 … wall No. 4.

Claims

1. An electronic control device is provided with:

a cover having a hollow opening;

a connector inserted into the opening; and

a compressible sealing member disposed in contact with the 1 st position of the inner peripheral portion of the opening, the compressible sealing member being in close contact with the inner peripheral portion of the opening and the connector in a compressed state,

the electronic control unit is characterized in that,

the opening portion has a thickness in a 1 st direction as a direction in which the connector is inserted,

the area of the hollow region as the hollow region of the opening part is reduced or maintained along the 1 st direction,

the sealing member is disposed on an outer peripheral portion of the connector and inserted into the opening portion in the 1 st direction together with the connector,

the area of the hollow region at the 1 st position is smaller than the area of the hollow region at the 1 st-direction entrance of the opening portion,

the cross section of the opening part is a polygon, at least 1 inner wall surface of a plurality of inner wall surfaces of the opening part corresponding to each side of the polygon is a step surface,

the step face includes: the liquid crystal display device includes a 1 st surface including the 1 st direction, a 2 nd surface parallel to the 1 st surface and disposed further on an outer peripheral side of the opening than the 1 st surface, and a boundary portion which is a boundary between the 1 st surface and the 2 nd surface, and a proportion of the 2 nd surface decreases as the liquid crystal display device advances in the 1 st direction.

2. The electronic control device according to claim 1,

the shape of the inner peripheral portion of the opening has a plane-symmetric shape with respect to a plane including the 1 st direction as a symmetric plane.

3. The electronic control device according to claim 1,

the hollow region has a widening in a 2 nd direction perpendicular to the 1 st direction and a 3 rd direction perpendicular to the 1 st direction and the 2 nd direction,

when the hollow region at the entrance of the opening portion in the 1 st direction is compared with a region of the outer shape of the sealing member in an uncompressed state disposed on the outer periphery of the connector, the magnitude relationship in the 2 nd direction is different from the magnitude relationship in the 3 rd direction.

4. The electronic control device according to claim 1,

the area of the hollow region continuously decreases as the hollow region advances in the 1 st direction within a predetermined section in the 1 st direction.

5. The electronic control device according to claim 1,

the boundary portion is a straight line connecting a widthwise center of the inner wall surface at the entrance in the 1 st direction and widthwise ends of the inner wall surface that have advanced a predetermined distance in the 1 st direction.

6. The electronic control device according to claim 1,

the cross section of the opening portion is formed by a plurality of sets of parallel sides, and the inner wall surface corresponding to at least 1 set of the plurality of sets of sides is the step surface.